Perched on the abyss, I was about to drop into a black hole ringed by surging white water. There was no turning back now. Paddle hard. Be aggressive. Follow my guide's line. As an avid sea kayaker I was eager to try white water for the first time. And where better than in the foothills of the Andes? I knew white water was a whole different skill set, but I was confident some of my sea kayaking knowledge would cross over. Turns out I was a little over-confident...